He at-regulator for incubators



(No Model.)

P. MEYER. Heat Regulator for Incubators.

No; 237,035. Patented Jan. 25,1881.

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TNESSB'SL UNITED STATES PATENT ()FFICE.

FREDERICK MEYER, OF PHILADELPHIA, PENNSYLVANIA.

H EAT'- REGU LATO R FO R IN C U BATO RS.

SPECIFICATION forming part of Letters Patent No. 237,035, dated January 25, 1881.

Application filed July 3, 1880. (No model.)

To all whom it may concern:

Be it known that I, FREDERICK MEYER, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Heat-Regulators for lncubatorsg-of which the following is shifted by the expansion and contraction of the ether, and the lever thus moved to open and close a damper. The damper, when open, allows escape of the heat from the stove to the outer air; but I have found that high winds tend to drive some portion of the heat through the radiating-tubes and raise the heat of the water.

The object of the present improvement is to prevent any portion of the heat, or only so much as is required, from passing to the radiating-tubes and the invention consists in a damper-shaft with a damper at each end, one in the direct flue of the heater and the other in the escape-pipe of the radiating-tubes, and connected with the automatic devices before described, so that when one damper is open the other is closed.

In the accompanying drawings, forming part of this specification, Figure 1 is a perspective view of an incubator provided with my improvements. Fig. 2 is a cross-section on line 00 a; of Fig. 1; and Fig. 3 is a vertical section of the escape'pipes, showing the dampers.

Similar letters of reference indicate corresponding parts.

A is the outer casing of the incubator; B, the incubating-chamber; O O, chambers at each end for containing water. K is the heatsupply pipe, connected with the stack 11 and with the radiating-tubes D, that connect, by a pipe, E, with the stack H. In the stack H is adamper, G, which, when closed, compels the heat from pipe K'to enter radiating-tubes D and pass by pipe E to the stack, and when open allows the heat to pass directly out. These parts are the same as shown in said Letters Patent.

In the chamber 0 are placed the devices for moving the damper, as next described. F is a lever or balance, made in the form of a gutter, having enlarged ends ff, and hung on a pivot, e. I is a tube, placed on lever F and fitted at its ends with reservoirs ij, into which the tubes open. In the reservoir i is placed ether, and tube I and reservoir j contain mercury. The end of lever F, next to reservoir 'i, is provided with a weight, 0, to balance the mercury. The mercury is shifted by the expansion 'and contraction of the ether, and the lever thus tilted. This device is similar to that shown and described in the aforesaid Letters Patent,

To one end of lever F is connected a bent arm, g, the outer end of which is formed with an eye, that takes over a crank-arm, 01, projecting from the shaft ii, that carries damper G. This shaft It extends into the escape-pipe E of the radiating-tubes, and carries a damper, L, that is placed at right angles to damper G.

The operation is, that when the parts are placed with the lever F in equilibrium, damper G closed and damper L open, the heat-all passes through the radiating-tubes D. When the ether is expanded by increase of heat the mercury is moved in tube I and raised in reservoir j, and that end of lever F thus borne down. This movement opens damper G more or less, and closes damper L in proportion, thus allowing a portion of the heat to escape directly to the stack. The full movement of lever F opens damper G wholly, and entirely closes damper L, so that there can be no heat pass through tubes D, either by a draft or by being driven through by wind.

A decrease of temperature in chamber 0 will contract the ether, the mercury will flow back, and lever F moved in the opposite direction, so that the dampers will be moved to admit heat to the tubes D.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

As an improvement in heat-regulators for incubators, the dampers G L, connected on shaft h and placed one in stack H and the other in the escape-flue of the heat-radiating tubes, combined with the lever F, connected with shaft h, and the devices for giving movement to said lever F automatically by changes of temperature, all substantially as shown and described.

FREDERICK MEYER. Witnesses:

BENNY SALINGLE, O. G. MGCLURE. 

